JP4315220B2 - Valve device - Google Patents

Description

The present invention relates to a valve device in which a plurality of damper chambers for oil dumping vibrations of a plurality of spools are formed inside a valve body, for example, a technique suitable for use in, for example, a hydraulic control device of an automatic transmission.
In addition, the upper and lower sides in this specification point out the up-down direction (top-and-bottom direction) in the state in which the valve apparatus was attached to the attachment target (for example, automatic transmission etc.).

(Conventional technology)
As an example of the background art, a spool valve mounted on a hydraulic control device for an automatic transmission for a vehicle is illustrated. A hydraulic pressure control device mounted on an automatic transmission is equipped with a spool valve that performs hydraulic pressure control. A spool valve has a spool disposed inside a hollow cylindrical sliding hole formed in the valve body. This spool is driven in the axial direction by hydraulic pressure generated by an electromagnetic actuator or a pilot valve. Controls the output hydraulic pressure.

Vibration caused by the drive frequency of the electromagnetic actuator is transmitted to the spool. As a technique for preventing the output hydraulic pressure from fluctuating (vibrating) due to the vibration of the spool, a technique using a damper means for oil dumping the movement of the spool is known for the spool valve of the hydraulic control device (for example, Patent Document 1). To 4).
An example of the damper means in the prior art will be described with reference to FIG. In addition, the same reference numerals are given to the same functional components as those in the embodiments described later.
The damper means fills the inside of a volume variation chamber (hereinafter referred to as a damper chamber 26) formed between the spool 5 and the valve body 2 with oil, and provides an orifice 41 for communicating the damper chamber 26 with the outside. The vibration of the spool 5 is suppressed by reducing the volume variation of the damper chamber 26 by providing it below the surface.

(Problems of conventional technology)
When air enters the damper chamber 26, air compression occurs in the damper chamber 26 and the oil dumping effect of the spool 5 is reduced. For this reason, it is necessary to fill the inside of the damper chamber 26 and the orifice 41 with oil.
As a technique for filling the inside of the damper chamber 26 and the orifice 41 with oil, in the conventional technique, as shown in FIG. 6, (a) the orifice 41 is provided in the upper portion of the damper chamber 26, and (b) the damper chamber 26 is adjacent to the damper chamber 26. (C) the oil reservoir space 42 and the orifice 41 are communicated, and (d) the upper opening of the drain pipe 101 that communicates the oil reservoir space 42 and the oil pan 100 is located above the orifice 41. By providing the oil level, the oil level position of the oil reservoir space 42 is set above the orifice 41 to cope with the problem.

As described above, in the prior art, the damper discharge oil passage leading from the damper chamber 26 to the oil pan 100 is complicated because the damper chamber 26 is filled with oil.
In particular, when a plurality of spools 5 are assembled inside one valve body 2 and damper means are provided in each spool 5, by providing a complicated damper discharge oil passage next to each spool 5, There is a problem that the lateral width of the valve body 2 is increased, the valve body 2 is enlarged, the mountability to the vehicle is deteriorated, and the weight is increased.
JP 2002-130513 A Japanese Utility Model Publication No. 63-159410 JP 2005-121069 A JP 2006-307941 A

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its purpose is to discharge a damper for filling each damper chamber and each orifice with oil even if a plurality of damper means are provided inside one valve body. An object of the present invention is to provide a valve device that can simplify the oil passage and avoid an increase in size and weight of the valve body.

[Means of claim 1]
The valve body of the valve device adopting the means of claim 1 includes one oil reservoir space above each damper chamber in a state of being attached to an attachment object (for example, an AT case of an automatic transmission). A configuration is adopted in which the upper portion of the damper chamber communicates with the upper oil reservoir space via an orifice.
As described above, even if a plurality of damper chambers are provided, only one oil reservoir space is required, and a damper discharge oil path for filling each damper chamber and each orifice with oil can be simplified. Further, since the oil reservoir space is a horizontal hole that traverses the plurality of spools and is provided above each damper chamber, the lateral width of the valve body does not include the lateral width of the oil reservoir space. For this reason, the lateral width of the valve body can be formed in a compact manner, so that the mountability can be improved and the weight can be reduced.

[Means of claim 2]
The oil reservoir space in the valve device employing the means of claim 2 is a straight horizontal hole, and the oil reservoir space can be formed by drilling with a drill blade.

[Means of claim 3]
In the valve device employing the means of claim 3, the lateral hole forming the oil reservoir space is provided across the plurality of damper chambers.
As a result, the communication path between each damper chamber and the oil reservoir space can be made straight and short, and the process of communicating between the damper chamber and the oil reservoir space is facilitated.

[Means of claim 4]
In the valve device employing the means of claim 4, the oil discharge side in the oil reservoir space is inclined upward in the lateral hole forming the oil reservoir space.
Thereby, the liquid level position of the oil reservoir space is increased, and each damper chamber and each orifice can be reliably filled with oil.

[Means of claim 5]
In the valve device employing the means of claim 5, the lateral hole forming the oil reservoir space is inclined with respect to the lower surface of the valve body.
Thereby, even if the lower surface of the valve body is mounted horizontally with respect to the mounting object, the liquid level of the oil reservoir space can be increased, and each damper chamber and each orifice can be reliably filled with oil. .

[Means of claim 6]
In the valve device employing the means of claim 6, the lateral hole forming the oil reservoir space is inclined by attaching the lower surface of the valve body to the inclined surface of the attachment object.
As a result, the liquid level of the oil reservoir space can be increased without obliquely forming a lateral hole that forms the oil reservoir space in the valve body, and each damper chamber and each orifice can be reliably filled with oil.

[Means of Claim 7]
In the valve device adopting the means of claim 7, the vertical breathing hole that communicates the horizontal hole that forms the oil reservoir space and the damper chamber passes through the horizontal hole that forms the oil reservoir space from the upper surface of the valve body. It is a straight downward vertical hole reaching the upper part, and this downward vertical hole is closed by a plug at a position above the lateral hole forming the oil reservoir space.

[Means of Claim 8]
In the valve device employing the means of claim 8, the vertical breathing hole communicating with the horizontal hole forming the oil reservoir space and the damper chamber passes through the upper portion of the damper chamber from the lower surface of the valve body (oil reservoir space). ), And the upward vertical hole is closed by a mounting object at a position below the damper chamber.

[Means of claim 9]
Lateral hole forming the Oite oil reservoir space valve device which employs the claims 9, which communicates with the drain passage for returning the oil to the drain pan of an automatic transmission for a vehicle, the drain passage, the oil It extends downward from the reservoir space.

[Means of Claim 10 ]
The attachment object to which the valve device employing the means of claim 10 is attached is an AT case that covers the gear device in the automatic transmission for a vehicle.
As a result, it is possible to improve the mountability and reduce the weight of the valve device mounted on the automatic transmission.

BEST MODE valve arrangement, the interior of one of the valve body, thereby mounting a plurality of spool, the displacement of each spool are those damper chamber that oil dumping is plurality, the lower surface of the valve body automatic transmission It is used by being fixed to an upward surface (including an obliquely upward surface) of an AT case of the machine (an example of an attachment object whose top-to-bottom direction does not change in use).
The inside of the valve body includes one oil reservoir space above each damper chamber in a state of being attached to the attachment target .
Their to, each of the plurality of damper chambers to communicate with each other through the oil reservoir space and the orifice immediately above the damper chamber. The oil reservoir space is a horizontal hole, and the horizontal hole is formed in a direction crossing the plurality of spools.

A first embodiment in which the present invention is applied to a valve device that forms part of a hydraulic control device for an automatic transmission will be described with reference to FIGS. 1 and 2.
First, the main part of the hydraulic control device will be described.
The automatic transmission changes the output rotation ratio of the engine that generates the output for driving the vehicle, changes the rotation direction, locks up the torque converter, switches between two wheels and four wheels depending on the vehicle type, etc. In order to carry out these operations, a plurality of friction engagement devices (hydraulic clutch, hydraulic brake, etc.) are mounted, and hydraulic pressure for controlling the engagement / disengagement of each friction engagement device according to the vehicle running state (including the driving situation of the occupant). Equipped with a control device. Each friction engagement device includes a friction engagement portion (multi-plate or the like) and a hydraulic actuator that engages and disengages the friction engagement portion.

The hydraulic control device includes a hydraulic circuit and an electronic control device (hereinafter referred to as AT-ECU) (not shown) that controls the hydraulic circuit.
The hydraulic circuit includes a valve device equipped with a plurality of electromagnetic hydraulic control valves for controlling the supply hydraulic pressure of each hydraulic actuator.
The valve device shown in this embodiment is mounted on the outer surface of an AT case 1 (automatic transmission case: an example of an attachment object) that houses a gear device (such as a planetary gear device) in an automatic transmission. A plurality of electrohydraulic control valves are mounted inside one valve body 2.

(Description of electromagnetic hydraulic control valve)
An example of the electromagnetic hydraulic control valve will be described with reference to FIG.
The electromagnetic hydraulic control valve includes a spool valve 3 and an electromagnetic actuator 4.
The spool valve 3 includes a valve body 2 (circuit housing or the like in which an oil passage forming a hydraulic circuit is formed) that is directly mounted on the outer surface of the AT case 1, a spool 5 that switches a hydraulic port, and a spool 5 that is closed. And a return spring 6 for urging in the direction (right side in FIG. 2).

(Explanation of valve body 2)
The valve body 2 is directly mounted on the upper surface of the AT case 1 using fastening means such as bolts, and a surface in a direction in contact with the AT case 1 is referred to as a lower surface.
One valve body 2 is provided with a plurality of hollow cylindrical slide holes 7 arranged in the axial direction for each of the electromagnetic hydraulic control valves so that a plurality of electromagnetic hydraulic control valves are mounted.
In the following, as a specific example of the electromagnetic hydraulic control valve, an N / L (normally low, normally closed) type in which the output hydraulic pressure decreases (or stops) when energization of the electromagnetic actuator 4 is stopped will be described. .

The sliding hole 7 formed inside the valve body 2 is a shaft hole that supports the spool 5 so as to be slidable in the axial direction (horizontal direction).
In addition to the sliding hole 7, an input port 11, an output port 12, a discharge port 13, an F / B (feedback) port 14, a breathing port 15, and a damper discharge oil passage 16 are formed in the valve body 2.

The input port 11 is supplied with hydraulic pressure generated by an oil pump in the automatic transmission via an oil passage, a switching valve, and the like.
The output port 12 communicates with a friction engagement device (specifically, a hydraulic servo chamber of a hydraulic actuator) in the automatic transmission via an oil passage.
The discharge port 13 communicates with the inside of the automatic transmission (the internal space of the AT case 1 or the oil pan in the AT case 1).
The F / B port 14 communicates with an F / B chamber 25 described later.
The breathing port 15 communicates with a drain space (volume fluctuation chamber) between the spool 5 and the electromagnetic actuator 4.

The input port 11, the output port 12, the discharge port 13, the F / B port 14, and the breathing port 15 described above are formed from the lower surface of the valve body 2 into the sliding hole 7.
The F / B port 14 communicates with the output port 12 via an orifice (not shown) formed in the valve body 2 and generates output hydraulic pressure in the F / B chamber 25. In addition, the breathing port 15 communicates with the discharge port 13 via an oil passage (not shown) formed in the valve body 2 to enable the volume variation of the drain space between the spool 5 and the electromagnetic actuator 4. Yes.

  The damper discharge oil passage 16 is an oil passage that guides oil filled in a damper chamber 26 and an orifice 41 described later to the inside of the AT case 1. Details of the damper discharge oil passage 16 will be described later.

(Description of spool 5)
The spool 5 is slidably disposed in the axial direction inside the sliding hole 7, and has an input seal land 21 that seals the input port 11 and a discharge seal land 22 that seals the discharge port 13. An output chamber (distribution chamber) 23 that is always in communication with the output port 12 is formed between the input seal land 21 and the discharge seal land 22.
Further, the spool 5 includes an F / B land 24 having a smaller diameter than the input seal land 21 on the left side of the input seal land 21 in FIG. 2, and an F / B chamber 25 is provided between the input seal land 21 and the F / B land 24. It is formed.

As described above, the F / B chamber 25 communicates with the output port 12 via an orifice (not shown), and generates an F / B hydraulic pressure corresponding to the output pressure in the spool 5.
As the output pressure increases, the F / B hydraulic pressure applied to the F / B chamber 25 increases as the output pressure increases, and the differential pressure due to the land difference between the input seal land 21 and the F / B land 24 increases. Then, “F / B valve closing force (force in the valve closing direction)” is generated in the spool 5. This stabilizes the displacement of the spool 5 when the output pressure is generated, and prevents the output pressure from fluctuating due to fluctuations in the input pressure.

(Description of return spring 6)
The return spring 6 is a coil spring that is spirally formed in a cylindrical shape to give a “spring valve closing force (force in the valve closing direction)” to the spool 5, and is compressed into the damper chamber 26 on the left side of FIG. It is arranged in the state that was done. The return spring 6 has one end in contact with the lower surface of the adjustment screw 27 that closes the left end in FIG. 2 of the sliding hole 7, and the other end in contact with the end of the spool 5. "Spring valve closing force" can be adjusted by (screwing amount).
In the spool 5, the “spring valve closing force” generated by the return spring 6, the “F / B valve closing force” generated by the pressure in the F / B chamber 25, and the “drive valve opening force” generated by the electromagnetic actuator 4 are balanced. It can be stopped at a position.

(Description of electromagnetic actuator 4)
The electromagnetic actuator 4 is a driving means for directly driving the spool 5 by a magnetomotive force corresponding to a driving current (energization amount) given from an AT-ECU (not shown) and displacing the spool 5 in the valve opening direction. , A plunger 32, a yoke 33, a stator core 34, and a connector 35 (reference numeral, see FIG. 1).
The coil 31 generates a magnetic force when energized to form a magnetic flux loop passing through the plunger 32 and the magnetic stator (the yoke 33 and the stator core 34), and an insulating coating is applied around the resin bobbin. A large number of conductive wires (such as enamel wires) are wound.

The plunger 32 is a magnetic metal (for example, a ferromagnetic material such as iron) having a substantially cylindrical shape. The plunger 32 is supported by a shaft 36 and a leaf spring 37 so as to be displaceable in the axial direction.
The shaft 36 has a round bar shape and is slidably supported in a through hole formed in the center of the stator core 34 in the axial direction. The shaft 36 is press-fitted and fixed to the center of the plunger 32 on the left side in FIG. ing.
The leaf spring 37 has a disk shape, and its outer peripheral edge is coupled to the yoke 33 together with a cover 38 that closes the bottom surface of the yoke 33 (the surface on the right side in FIG. 2). 2 It is combined with a convex portion formed at the center of the right end.

The yoke 33 is a magnetic metal (for example, a ferromagnetic material such as iron) that flows around the coil 31 and flows magnetic flux, and has a cylindrical outer cylinder that covers the outer periphery of the coil 31 and a right side of the plunger 32 in FIG. It consists of an inner peripheral cylinder that covers the outer periphery and an annular bottom that joins the outer peripheral cylinder and the inner peripheral cylinder on the right side of FIG. In addition, a side magnetic gap is formed between the outer peripheral surface of the plunger 32 and the inner peripheral surface of the inner peripheral cylinder of the yoke 33 so as to transfer the magnetism in the radial direction.
A thin claw portion is provided at the left end (opening end) of the yoke 33 in FIG. 2, and the valve body 2 and the electromagnetic actuator 4 are assembled by caulking the claw portion after incorporating the components of the electromagnetic actuator 4 inside. Are firmly bonded.

The stator core 34 is a magnetic metal (for example, a ferromagnetic material such as iron) that has a flange portion magnetically coupled to the open end of the yoke 33 and faces the plunger 32 in the axial direction. 34, a magnetic attraction gap for magnetically attracting the plunger 32 is formed.
A part of the stator core 34 is provided with a recess into which the end of the plunger 32 can enter, and the stator core 34 and part of the plunger 32 are provided so as to intersect in the axial direction. A taper is formed on the outer peripheral surface of the recess, and the magnetic attraction force does not change with respect to the stroke amount of the plunger 32.

The connector 35 is a connection means for performing electrical connection with an AT-ECU (not shown) via a connection line, and connector terminals respectively connected to both ends of the coil 31 are arranged therein.
The AT-ECU controls the drive current applied to the electromagnetic actuator 4 by duty control. By controlling the drive current applied to the electromagnetic actuator 4, the “spring closing force” of the return spring 6 and the F / B chamber are controlled. The output hydraulic pressure of the output port 12 is controlled by applying a “drive valve opening force” against the “F / B valve closing force” by 25 to the spool 5 and displacing the axial position of the spool 5.

(Operation of electromagnetic hydraulic control valve)
When the friction engagement device is engaged, the drive current applied from the AT-ECU to the electromagnetic actuator 4 is increased by duty control, and the spool 5 is displaced in the valve opening direction. As the stroke amount in the valve opening direction of the spool 5 increases, the input seal length in the axial direction in which the input seal land 21 closes the input port 11 decreases, and the axial direction in which the discharge seal land 22 closes the discharge port 13. The discharge seal length becomes longer, the output hydraulic pressure of the output port 12 increases, and the friction engagement device (specifically, the friction engagement portion) is engaged.
The AT-ECU increases the output hydraulic pressure of the output port 12 by rapidly increasing the drive current applied to the electromagnetic actuator 4 at the timing when the engagement of the friction engagement device is completed, thereby increasing the moving speed of the spool 5. The engagement of the friction engagement device that has been completed is strengthened.
When the friction engagement device is disengaged, the friction engagement device is disengaged by an operation opposite to the above.

[Features of Example 1]
As described above, the drive current applied to the electromagnetic actuator 4 is duty-controlled, and the spool 5 driven by the electromagnetic actuator 4 is caused by the duty frequency (drive frequency: about 250 to 300 Hz, for example). A slight vibration (dither) occurs.
When noticeable micro vibration occurs in the spool 5, the output hydraulic pressure fluctuates due to the duty frequency, which hinders smooth engagement of the friction engagement device.
Therefore, each electromagnetic hydraulic control valve mounted on the valve body 2 is provided with damper means as means for suppressing fine vibration of the spool 5 caused by the duty frequency.

The damper means oil-dumps the vibration of the spool 5, and the damper chamber 26 whose volume changes in accordance with the displacement of the spool 5 and the oil discharged from the damper chamber 26 are supplied to the outside of the valve body 2 (AT case). 1) and an orifice 41 provided in the damper discharge oil passage 16 in the vicinity of the damper chamber 26.
The orifice 41 restricts the flow area of the damper discharge oil passage 16 in the vicinity of the damper chamber 26, slows the flow rate of the breathing oil accompanying the volume variation of the damper chamber 26, and delays the volume variation speed of the damper chamber 26. This is a means for slowing the displacement speed of the spool 5.

Next, a characteristic technique in the valve device of the first embodiment will be described with reference to FIG.
In the valve device of the first embodiment, as described above, a plurality of spool valves 3 are mounted inside one valve body 2, and each spool valve 3 is provided with a damper chamber 26 for oil dumping the displacement of the spool 5. It has been. That is, a plurality of damper chambers 26 are provided inside one valve body 2.
The valve body 2 is used by being fixed to the upper surface of the AT case 1 where the vertical direction does not change in the usage state.
Inside the valve body 2 of the first embodiment, one oil reservoir space 42 is provided above each damper chamber 26 in a state attached to the AT case 1. That is, a common oil reservoir space 42 is provided above each damper chamber 26. The upper portion of each damper chamber 26 (the highest position in the damper chamber 26) is provided so as to communicate with the oil reservoir space 42 via the orifice 41.

The above characteristic technique will be specifically described.
The damper discharge oil passage 16 of this embodiment is formed in the valve body 2, and includes a vertical breathing hole 43 communicating the upper part of the damper chamber 26 and the oil reservoir space 42, the oil reservoir space 42, and the oil reservoir space 42. The drain space 44 is configured to communicate with the interior of the AT case 1.

As shown in FIG. 1B, the oil reservoir space 42 in this embodiment is a straight horizontal hole cut by a drill blade. The horizontal hole forming the oil reservoir space 42 is formed across the damper chamber 26 from the side surface of the valve body 2, and the rear end of the horizontal hole forming the oil reservoir space 42 communicates with the upper end of the drain passage 44. To do.
The open end of the horizontal hole forming the oil reservoir space 42 is closed by a plug 45 such as a ball, and a space in which oil can be stored is formed between the deep end of the horizontal hole and the plug 45.

The vertical breathing hole 43 is a hole extending in the vertical direction communicating with the horizontal hole forming the oil reservoir space 42 and the damper chamber 26, and the orifice 41 is formed in the vertical breathing hole 43.
The vertical breathing hole 43 according to the first embodiment is a straight line that reaches the upper end portion of the damper chamber 26 from the upper surface of the valve body 2 (the surface facing upward in the vehicle-mounted state) through the lateral hole that forms the oil reservoir space 42. It is a downward vertical hole.
That is, the vertical breathing hole 43 is a straight vertical hole that is cut downward from the upper surface of the valve body 2 by a drill blade.
The downward vertical hole forming the vertical breathing hole 43 has a two-stage hole diameter, and a portion communicating with the damper chamber 26 is provided in the small-diameter hole, and the orifice 41 is formed by the small-diameter hole.
The downward vertical hole that forms the vertical breathing hole 43 is blocked by a plug 45 such as a ball at a position above the horizontal hole that forms the oil reservoir space 42. That is, the upper end opening of the downward vertical hole is closed by the plug 45.

  The drain passage 44 is a straight vertical hole cut upward by a drill blade from the lower surface of the valve body 2, and the deep end (upper end) of the vertical hole forming the drain passage 44 forms the oil reservoir space 42. It communicates with the back end of the side hole. As described above, the drain passage 44 is provided to extend downward from the oil reservoir space 42. The lower part of the drain passage 44 is provided in communication with the interior of the AT case 1, and the oil guided to the drain passage 44 is returned to the oil pan of the automatic transmission.

(Effect of Example 1)
Leaked oil that has passed through the sliding clearance between the valve body 2 and the spool 5 is supplied to each damper chamber 26. The leaked oil guided to each damper chamber 26 passes through the upper part of the damper chamber 26 → the vertical breathing hole 43 (including the orifice 41) → the lateral hole forming the oil reservoir space 42 → the drain passage 44 and passes through the inside of the AT case 1. Returned to
For this reason, for example, even when air is mixed into the damper chamber 26 during assembly of the valve device or during maintenance, the air mixed in the damper chamber 26 remains in the vertical breathing hole 43 provided in the upper portion of the damper chamber 26. Then, the oil is discharged into the oil reservoir space 42, and the inside of the damper chamber 26 and the inside of the orifice 41 can be filled with oil.

In the valve device of the first embodiment, a plurality of damper chambers 26 are provided inside one valve body 2, but as described above, one oil reservoir space 42 is provided above each damper chamber 26, and A configuration is adopted in which the upper portions of the plurality of damper chambers 26 communicate with an upper oil reservoir space 42 via an orifice 41. Thus, even if a plurality of damper chambers 26 are provided, only one oil reservoir space 42 is required, and the damper discharge oil passage 16 can be simplified.
Since the oil reservoir space 42 is provided above each damper chamber 26, the lateral width of the valve body 2 does not include the lateral width of the oil reservoir space 42. For this reason, the lateral width of the valve body 2 can be suppressed. As a result, the vehicle mountability of the valve device can be improved and the weight of the valve device can be reduced.

The oil sump space 42 is a straight horizontal hole. The oil sump space 42 can be formed by drilling with a drill blade, the space for forming the oil sump space 42 can be reduced, and the oil sump space 42 is formed. Cost can be reduced.
Since the lateral hole that forms the oil reservoir space 42 is provided across the plurality of damper chambers 26, the communication passage that communicates each damper chamber 26 and the oil reservoir space 42 can be straight and shortened. The processing of the vertical breathing hole 43 that allows the chamber 26 and the oil reservoir space 42 to communicate with each other can be easily performed.

A second embodiment will be described with reference to FIG. In the following embodiments, the same reference numerals as those in the first embodiment denote the same functions.
The vertical breathing hole 43 of the second embodiment is a straight upward vertical hole that reaches the horizontal hole that forms the oil reservoir space 42 from the lower surface of the valve body 2 through the upper portion of the damper chamber 26.
That is, the vertical breathing hole 43 of the second embodiment is a straight vertical hole that is cut upward from the lower surface of the valve body 2 by a drill blade.
The upward vertical hole that forms the vertical breathing hole 43 has a two-stage hole diameter, and a portion that communicates with the horizontal hole that forms the oil reservoir space 42 is provided in the small diameter hole, and the orifice 41 is formed by this small diameter hole. Note that the lower end (opening) of the upward vertical hole forming the vertical breathing hole 43 is closed by the AT case 1.
Thereby, the plug 45 for closing the lower end opening of the upward vertical hole forming the vertical breathing hole 43 becomes unnecessary, and the number of parts and the assembling cost can be suppressed.

A third embodiment will be described with reference to FIG.
In the third embodiment, the lateral hole that forms the oil reservoir space 42 is arranged so that the oil discharge side of the lateral hole that forms the oil reservoir space 42, that is, the side communicating with the drain passage 44 is the upper side when the valve body 2 is attached to the AT case 1. It inclines toward.

Specifically, in the third embodiment, as shown in FIG. 4, the horizontal hole that forms the oil reservoir space 42 is inclined with respect to the lower surface of the valve body 2, and the drain passage is formed in the horizontal hole that forms the oil reservoir space 42. The side communicating with 44 is inclined upward.
As a result, the liquid level in the oil reservoir space 42 can be increased, the air in each damper chamber 26 is reliably discharged, and each damper chamber 26 and each orifice 41 can be reliably filled with oil.
Further, since the horizontal hole forming the oil reservoir space 42 is inclined, even if the lower surface of the valve body 2 is attached to the horizontal surface of the AT case 1, the liquid level position of the oil reservoir space 42 can be increased, and each damper The chamber 26 and each orifice 41 can be reliably filled with oil.

A fourth embodiment will be described with reference to FIG.
In the fourth embodiment, the lower surface of the valve body 2 is attached to the inclined surface of the AT case 1 so that the side communicating with the drain passage 44 in the horizontal hole forming the oil reservoir space 42 is inclined upward.
As a result, as shown in the third embodiment, the liquid level of the oil reservoir space 42 can be increased without providing a horizontal hole (oil reservoir space 42) obliquely in the valve body 2, and each damper chamber 26 and Each orifice 41 can be reliably filled with oil.

[Modification]
In the above embodiment, an N / L type electrohydraulic control valve is shown. However, an N / H (normally high, normal open) type electrohydraulic control valve that increases the output oil pressure when the energization of the electromagnetic actuator 4 is stopped. It may be used.
In the above embodiment, an electromagnetic hydraulic control valve that drives the spool valve 3 with the electromagnetic actuator 4 is shown. However, the spool valve 3 may be driven by the output hydraulic pressure of a pilot valve (electromagnetic three-way valve).

In the above embodiment, the valve device attached to the outer surface of the AT case 1 is shown. However, the present invention may be applied to a valve device attached to the inside of the AT case 1 (for example, the inside of an oil pan). In this case, the drain passage 44 described above is eliminated, and the end of the oil reservoir space 42 is opened directly to the side surface of the valve body 2 so that the oil in the oil reservoir space 42 is discharged directly into the AT case 1. May be.
In the above embodiment, the electromagnetic hydraulic control valve for controlling the hydraulic pressure is shown, but an oil flow control valve for controlling the oil amount may be used.

In the above embodiment, the spool valve 3 having the three-way valve structure is shown, but the spool valve 3 having another structure such as a two-way valve (open / close valve) or a four-way valve structure may be used.
In the above embodiment, an example in which the electromagnetic actuator 4 is used as means for applying a driving force to the spool 5 has been described. However, another electric actuator such as a piezoelectric actuator or a motor may be used, or a fluid pressure actuator may be used. .
In the above embodiment, the example in which the present invention is applied to the valve device mounted on the automatic transmission has been described. However, the present invention may be applied to a valve device other than the automatic transmission.

FIG. 3 is a top view of the valve device, and a cross-sectional view of the valve device along the line AA (Example 1). (Example 1) which is sectional drawing of an electrohydraulic control valve. (Example 2) which is explanatory drawing of a damper discharge oil path. (Example 3) which is explanatory drawing of a damper discharge oil path. (Example 4) which is explanatory drawing of a damper discharge oil path. It is explanatory drawing which looked at the valve apparatus from the axial direction, and is sectional drawing of the valve apparatus along a BB line (conventional example).

Explanation of symbols

1 AT case (attachment object)
2 Valve body 5 Spool (valve)
7 Sliding hole 16 Damper discharge oil passage 26 Damper chamber 41 Orifice 42 Oil reservoir space (horizontal hole)
43 Vertical breathing hole (downward vertical hole, upward vertical hole)
44 Drain passage 45 Plug

Claims (10)

While installing multiple spools inside one valve body,
A plurality of damper chambers for independently oil dumping the displacements of the plurality of spools are provided inside the one valve body,
In the valve device used by fixing the lower surface of the valve body to the upper side of the attachment object in which the vertical direction does not change in the usage state,
The inside of the valve body includes one oil reservoir space above each damper chamber in a state of being attached to the attachment object,
Upper portion of the plurality of damper chambers, and communicates through the oil reservoir space and the orifice,
The oil sump space is a side hole,
A valve device characterized in that a lateral hole forming the oil reservoir space is formed in a direction crossing the plurality of spools . The valve device according to claim 1,
The valve device characterized in that the lateral hole forming the oil reservoir space is a straight lateral hole. The valve device according to claim 1 or 2,
The valve device according to claim 1, wherein a side hole forming the oil reservoir space is provided across the plurality of damper chambers. The valve device according to claim 3,
The valve device characterized in that the oil discharge side in the oil reservoir space is inclined upward in the lateral hole forming the oil reservoir space. The valve device according to claim 4,
The valve device characterized in that a lateral hole forming the oil reservoir space is inclined with respect to a lower surface of the valve body. The valve device according to claim 4,
The valve device characterized in that the lateral hole forming the oil reservoir space is inclined by attaching the lower surface of the valve body to the inclined surface of the attachment object. In the valve apparatus in any one of Claims 1-6,
The vertical breathing hole that communicates the horizontal hole that forms the oil reservoir space and the damper chamber is a linear shape that reaches the upper portion of the damper chamber from the upper surface of the valve body through the horizontal hole that forms the oil reservoir space. A downward vertical hole,
The valve device characterized in that the downward vertical hole forming the vertical breathing hole is closed by a plug at a position above the horizontal hole forming the oil reservoir space. In the valve apparatus in any one of Claims 1-6,
The vertical breathing hole that communicates the lateral hole that forms the oil reservoir space and the damper chamber is a linear shape that reaches the lateral hole that forms the oil reservoir space from the lower surface of the valve body through the upper portion of the damper chamber. Is an upward vertical hole,
The valve device according to claim 1, wherein the upward vertical hole forming the vertical breathing hole is closed by the attachment object at a position below the damper chamber. In the valve apparatus in any one of Claims 1-8,
The lateral hole forming the oil reservoir space communicates with a drain passage for returning oil to a drain pan of an automatic transmission for a vehicle ,
The valve device according to claim 1, wherein the drain passage extends downward from the oil reservoir space. In the valve apparatus in any one of Claims 1-9,
The valve device according to claim 1, wherein the attachment object is an AT case that covers a gear device in an automatic transmission for a vehicle.

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